includecheck fix: Documentation, cfag12864b-example.c
includecheck fix: Documentation, cfag12864b-example.c

fix the following 'make includecheck' warning:

  Documentation/auxdisplay/cfag12864b-example.c: string.h is included more than once.

Signed-off-by: Jaswinder Singh Rajput <0599c1aba1ea3f0bcaf4115dd8076db98ee6d35c@gmail.com>
Acked-by: Randy Dunlap <e1d10faa7e2a0c027bf1ff1d20e7fd10154be7ea@oracle.com>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@linux-foundation.org>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs